Objective To compare the resistance to fracture of the root canals after instrumentation or not.
目的比较预备与不预备的根管以及预备后充填与不充填的根管抗折力。
The subsection excision sequence determined according to these principles and methods can improve the punch's resistance to fracture.
按照这些原则与方法确定分段切除顺序时可提高凸模的抗折断能力。
The anatomical distribution of cortical and cancellous bone in the femoral neck may be critical in determining resistance to fracture .
股骨颈中皮质骨和松质骨的解剖分布情况决定了其抗骨折的能力。
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